The surveillance testing of the
high pressure coolant injection (
HPCI) system was inadequate for monitoring
HPCI governor control system performance due to the licencees failure to incorporate vendor recommendations. The inadequate test controls for monitoring
HPCI governor control system performance allowed system degradation to go unnoticed until an actual failure of the
HPCI system occurred during the October 14, 1999, plant
scram. This issue was determined to have low to moderate risk significance because
HPCI is an important mitigating system during a loss of offsite power event, and it is likely that the system would not have been able to perform the intended function during a period greater than 30 days. The failure to have adequate test controls for determining
HPCI operability is an apparent violation of NRC requirements.
